diff --git a/chrome/content/zotero/xpcom/collectionTreeView.js b/chrome/content/zotero/xpcom/collectionTreeView.js
index 8afb27caab..e56fad337c 100644
--- a/chrome/content/zotero/xpcom/collectionTreeView.js
+++ b/chrome/content/zotero/xpcom/collectionTreeView.js
@@ -41,10 +41,11 @@ Zotero.CollectionTreeView = function()
 	
 	this._treebox = null;
 	this._highlightedRows = {};
-	this._unregisterID = Zotero.Notifier.registerObserver(this, ['collection', 'search', 'share', 'group', 'bucket']);
+	this._unregisterID = Zotero.Notifier.registerObserver(this, ['collection', 'search', 'share', 'group', 'trash', 'bucket']);
 	this._containerState = {};
 	this._duplicateLibraries = [];
 	this._unfiledLibraries = [];
+	this._trashNotEmpty = {};
 }
 
 /*
@@ -148,7 +149,6 @@ Zotero.CollectionTreeView.prototype.refresh = function()
 	
 	var self = this;
 	var library = {
-		id: null,
 		libraryID: null
 	};
 	
@@ -256,11 +256,14 @@ Zotero.CollectionTreeView.prototype.notify = function(action, type, ids)
 		return;
 	}
 	
+	if (action == 'refresh' && type == 'trash') {
+		this._trashNotEmpty[ids[0]] = !!Zotero.Items.getDeleted(ids[0]).length;
+		return;
+	}
+	
 	this.selection.selectEventsSuppressed = true;
 	var savedSelection = this.saveSelection();
 	
-	var madeChanges = false;
-	
 	if (action == 'delete') {
 		var selectedIndex = this.selection.count ? this.selection.selectedIndex : 0;
 		
@@ -432,20 +435,20 @@ Zotero.CollectionTreeView.prototype.getCellText = function(row, column)
 
 Zotero.CollectionTreeView.prototype.getImageSrc = function(row, col)
 {
-	var source = this._getItemAtRow(row);
-	var collectionType = source.type;
+	var itemGroup = this._getItemAtRow(row);
+	var collectionType = itemGroup.type;
 	switch (collectionType) {
 		case 'trash':
-			if (this.trashNotEmpty) {
+			if (this._trashNotEmpty[itemGroup.ref.libraryID ? itemGroup.ref.libraryID : 0]) {
 				collectionType += '-full';
 			}
 			break;
 		
 		case 'header':
-			if (source.ref.id == 'group-libraries-header') {
+			if (itemGroup.ref.id == 'group-libraries-header') {
 				collectionType = 'groups';
 			}
-			else if (source.ref.id == 'commons-header') {
+			else if (itemGroup.ref.id == 'commons-header') {
 				collectionType = 'commons';
 			}
 			break;
@@ -490,11 +493,13 @@ Zotero.CollectionTreeView.prototype.isContainerEmpty = function(row)
 	}
 	if (itemGroup.isGroup()) {
 		var libraryID = itemGroup.ref.libraryID;
+		libraryID = (libraryID ? libraryID : 0) + '';
 		
 		return !itemGroup.ref.hasCollections()
 				&& !itemGroup.ref.hasSearches()
-				&& this._duplicateLibraries.indexOf(libraryID + '') == -1
-				&& this._unfiledLibraries.indexOf(libraryID + '') == -1;
+				&& this._duplicateLibraries.indexOf(libraryID) == -1
+				&& this._unfiledLibraries.indexOf(libraryID) == -1
+				&& this.hideSources.indexOf('trash') != -1;
 	}
 	if (itemGroup.isCollection()) {
 		return !itemGroup.ref.hasChildCollections();
@@ -819,17 +824,16 @@ Zotero.CollectionTreeView.prototype._expandRow = function (row, forceOpen) {
 	if (isGroup) {
 		var group = Zotero.Groups.getByLibraryID(libraryID);
 		var collections = group.getCollections();
-		var showTrash = false;
 	}
 	else {
 		var collections = Zotero.getCollections(itemGroup.ref.id);
-		var showTrash = this.hideSources.indexOf('trash') == -1;
 	}
 	
 	var savedSearches = Zotero.Searches.getAll(libraryID);
 	var showDuplicates = this.hideSources.indexOf('duplicates') == -1
 							&& this._duplicateLibraries.indexOf(intLibraryID + '') != -1;
 	var showUnfiled = this._unfiledLibraries.indexOf(intLibraryID + '') != -1;
+	var showTrash = this.hideSources.indexOf('trash') == -1;
 	
 	// If not a manual open and either the library is set to be hidden
 	// or this is a collection that isn't explicitly opened,
@@ -841,7 +845,7 @@ Zotero.CollectionTreeView.prototype._expandRow = function (row, forceOpen) {
 		return 0;
 	}
 	
-	var startOpen = !!(collections.length || savedSearches.length || showDuplicates || showUnfiled);
+	var startOpen = !!(collections.length || savedSearches.length || showDuplicates || showUnfiled || showTrash);
 	
 	// If this isn't a manual open, set the initial state depending on whether
 	// there are child nodes
@@ -881,7 +885,7 @@ Zotero.CollectionTreeView.prototype._expandRow = function (row, forceOpen) {
 	
 	// Duplicate items
 	if (showDuplicates) {
-		var d = new Zotero.Duplicates(isGroup ? group.libraryID : 0);
+		var d = new Zotero.Duplicates(intLibraryID);
 		this._showRow(new Zotero.ItemGroup('duplicates', d), level, row + 1 + newRows);
 		newRows++;
 	}
@@ -890,22 +894,25 @@ Zotero.CollectionTreeView.prototype._expandRow = function (row, forceOpen) {
 	if (showUnfiled) {
 		var s = new Zotero.Search;
 		if (isGroup) {
-			s.libraryID = group.libraryID;
+			s.libraryID = libraryID;
 		}
 		s.name = Zotero.getString('pane.collections.unfiled');
-		s.addCondition('libraryID', 'is', isGroup ? group.libraryID : null);
+		s.addCondition('libraryID', 'is', libraryID);
 		s.addCondition('unfiled', 'true');
 		this._showRow(new Zotero.ItemGroup('unfiled', s), level, row + 1 + newRows);
 		newRows++;
 	}
 	
 	if (showTrash) {
-		var deletedItems = Zotero.Items.getDeleted();
-		if (deletedItems || Zotero.Prefs.get("showTrashWhenEmpty")) {
-			this._showRow(new Zotero.ItemGroup('trash', false), level, row + 1 + newRows);
+		var deletedItems = Zotero.Items.getDeleted(libraryID);
+		if (deletedItems.length || Zotero.Prefs.get("showTrashWhenEmpty")) {
+			var ref = {
+				libraryID: libraryID
+			};
+			this._showRow(new Zotero.ItemGroup('trash', ref), level, row + 1 + newRows);
 			newRows++;
 		}
-		this.trashNotEmpty = !!deletedItems;
+		this._trashNotEmpty[intLibraryID] = !!deletedItems.length;
 	}
 	
 	return newRows;
@@ -1785,7 +1792,7 @@ Zotero.ItemGroup.prototype.__defineGetter__('id', function () {
 			return 'U' + (this.ref.libraryID ? this.ref.libraryID : 0);
 		
 		case 'trash':
-			return 'T';
+			return 'T' + (this.ref.libraryID ? this.ref.libraryID : 0);
 		
 		case 'header':
 			if (this.ref.id == 'group-libraries-header') {
@@ -2005,6 +2012,7 @@ Zotero.ItemGroup.prototype.getSearchObject = function() {
 			includeScopeChildren = true;
 		}
 		else if (this.isTrash()) {
+			s.addCondition('libraryID', 'is', this.ref.libraryID);
 			s.addCondition('deleted', 'true');
 		}
 		else {
diff --git a/chrome/content/zotero/xpcom/data/item.js b/chrome/content/zotero/xpcom/data/item.js
index 8c41f86c11..855e100a05 100644
--- a/chrome/content/zotero/xpcom/data/item.js
+++ b/chrome/content/zotero/xpcom/data/item.js
@@ -2053,7 +2053,7 @@ Zotero.Item.prototype.save = function() {
 				}
 			}
 			// Refresh trash
-			Zotero.Notifier.trigger('refresh', 'collection', 0);
+			Zotero.Notifier.trigger('refresh', 'trash', this.libraryID ? this.libraryID : 0);
 			if (this._deleted) {
 				Zotero.Notifier.trigger('trash', 'item', this.id);
 			}
diff --git a/chrome/content/zotero/xpcom/data/items.js b/chrome/content/zotero/xpcom/data/items.js
index 29c9e29797..fcdadf58ce 100644
--- a/chrome/content/zotero/xpcom/data/items.js
+++ b/chrome/content/zotero/xpcom/data/items.js
@@ -125,16 +125,34 @@ Zotero.Items = new function() {
 	/**
 	 * Return items marked as deleted
 	 *
-	 * @param	{Boolean}	asIDs			Return itemIDs instead of
+	 * @param {Number|NULL}  libraryID
+	 * @param {Boolean}  asIDs			Return itemIDs instead of
 	 *											Zotero.Item objects
-	 * @return	{Zotero.Item[]|Integer[]}
+	 * @return {Zotero.Item[]|Integer[]}
 	 */
-	this.getDeleted = function (asIDs, days) {
-		var sql = "SELECT itemID FROM deletedItems";
-		if (days) {
-			sql += " WHERE dateDeleted<=DATE('NOW', '-" + parseInt(days) + " DAYS')";
+	this.getDeleted = function (libraryID, asIDs, days) {
+		// Throw warning for pre-3.0b3 arguments
+		if (typeof libraryID == 'boolean') {
+			throw new Error("libraryID must be a number or null");
+		}
+		
+		var sql = "SELECT itemID FROM items JOIN deletedItems USING (itemID) "
+				+ "WHERE libraryID"  + (libraryID ? "=?" : " IS NULL");
+		
+		if (days) {
+			sql += " AND dateDeleted<=DATE('NOW', '-" + parseInt(days) + " DAYS')";
+		}
+		
+		if (libraryID) {
+			var ids = Zotero.DB.columnQuery(sql, [libraryID]);
+		}
+		else {
+			var ids = Zotero.DB.columnQuery(sql);
+		}
+		
+		if (!ids) {
+			return [];
 		}
-		var ids = Zotero.DB.columnQuery(sql);
 		if (asIDs) {
 			return ids;
 		}
@@ -467,15 +485,15 @@ Zotero.Items = new function() {
 	/**
 	 * @param	{Integer}	days	Only delete items deleted more than this many days ago
 	 */
-	this.emptyTrash = function (days) {
+	this.emptyTrash = function (libraryID, days) {
 		Zotero.DB.beginTransaction();
-		var deletedIDs = this.getDeleted(true, days);
-		if (deletedIDs) {
+		var deletedIDs = this.getDeleted(libraryID, true, days);
+		if (deletedIDs.length) {
 			this.erase(deletedIDs);
-			Zotero.Notifier.trigger('refresh', 'collection', 0);
+			Zotero.Notifier.trigger('refresh', 'collection', libraryID ? libraryID : 0);
 		}
 		Zotero.DB.commitTransaction();
-		return deletedIDs ? deletedIDs.length : 0;
+		return deletedIDs.length;
 	}
 	
 	
diff --git a/chrome/content/zotero/xpcom/itemTreeView.js b/chrome/content/zotero/xpcom/itemTreeView.js
index 7c23f11fed..c4e60c7513 100644
--- a/chrome/content/zotero/xpcom/itemTreeView.js
+++ b/chrome/content/zotero/xpcom/itemTreeView.js
@@ -1546,10 +1546,7 @@ Zotero.ItemTreeView.prototype.deleteSelection = function (force)
 	else if (itemGroup.isTrash()) {
 		Zotero.Items.erase(ids);
 	}
-	else if (itemGroup.isGroup() || (force && itemGroup.isWithinGroup())) {
-		Zotero.Items.erase(ids);
-	}
-	else if (itemGroup.isLibrary() || force) {
+	else if (itemGroup.isLibrary(true) || force) {
 		Zotero.Items.trash(ids);
 	}
 	else if (itemGroup.isCollection()) {
diff --git a/chrome/content/zotero/xpcom/notifier.js b/chrome/content/zotero/xpcom/notifier.js
index 14fab27df4..dbade2ce42 100644
--- a/chrome/content/zotero/xpcom/notifier.js
+++ b/chrome/content/zotero/xpcom/notifier.js
@@ -28,7 +28,7 @@ Zotero.Notifier = new function(){
 	var _disabled = false;
 	var _types = [
 		'collection', 'creator', 'search', 'share', 'share-items', 'item',
-		'collection-item', 'item-tag', 'tag', 'group', 'bucket', 'relation'
+		'collection-item', 'item-tag', 'tag', 'group', 'trash', 'bucket', 'relation'
 	];
 	var _inTransaction;
 	var _locked = false;
@@ -277,7 +277,7 @@ Zotero.Notifier = new function(){
 					}
 				}
 				
-				if (runQueue[type][event].ids.length) {
+				if (runQueue[type][event].ids.length || event == 'refresh') {
 					totals += ' [' + event + '-' + type + ': ' + runQueue[type][event].ids.length + ']';
 				}
 			}
@@ -290,7 +290,7 @@ Zotero.Notifier = new function(){
 			
 			for (var type in runQueue) {
 				for (var event in runQueue[type]) {
-					if (runQueue[type][event].ids.length) {
+					if (runQueue[type][event].ids.length || event == 'refresh') {
 						trigger(event, type, runQueue[type][event].ids,
 							runQueue[type][event].data, true);
 					}
diff --git a/chrome/content/zotero/xpcom/zotero.js b/chrome/content/zotero/xpcom/zotero.js
index 98a68b5040..ec9cb09861 100644
--- a/chrome/content/zotero/xpcom/zotero.js
+++ b/chrome/content/zotero/xpcom/zotero.js
@@ -1383,7 +1383,7 @@ if(appInfo.platformVersion[0] >= 2) {
 		
 		var returns = [];
 		for (var i=0; i<args.length; i++){
-			if (!args[i]) {
+			if (!args[i] && args[i] !== 0) {
 				continue;
 			}
 			if (args[i].constructor.name == 'Array') {
diff --git a/chrome/content/zotero/zoteroPane.js b/chrome/content/zotero/zoteroPane.js
index 3151978412..9883a98712 100644
--- a/chrome/content/zotero/zoteroPane.js
+++ b/chrome/content/zotero/zoteroPane.js
@@ -404,7 +404,8 @@ var ZoteroPane = new function()
 		var days = Zotero.Prefs.get('trashAutoEmptyDays');
 		if (days) {
 			var d = new Date();
-			var deleted = Zotero.Items.emptyTrash(days);
+			// TODO: empty group trashes if permissions
+			var deleted = Zotero.Items.emptyTrash(null, days);
 			var d2 = new Date();
 			Zotero.debug("Emptied old items from trash in " + (d2 - d) + " ms");
 		}
@@ -1430,13 +1431,13 @@ var ZoteroPane = new function()
 			)
 		};
 		
-		if (itemGroup.isLibrary()) {
+		if (itemGroup.isLibrary(true)) {
 			// In library, don't prompt if meta key was pressed
 			var prompt = force ? false : toTrash;
 		}
 		else if (itemGroup.isCollection()) {
 			// In collection, only prompt if trashing
-			var prompt = force ? (itemGroup.isWithinGroup() ? toDelete : toTrash) : false;
+			var prompt = force ? toTrash : false;
 		}
 		else if (itemGroup.isSearch() || itemGroup.isUnfiled() || itemGroup.isDuplicates()) {
 			if (!force) {
@@ -1458,10 +1459,6 @@ var ZoteroPane = new function()
 			}
 			var prompt = toDelete;
 		}
-		// This should be changed if/when groups get trash
-		else if (itemGroup.isGroup()) {
-			var prompt = toDelete;
-		}
 		else if (itemGroup.isBucket()) {
 			var prompt = toDelete;
 		}
@@ -1570,6 +1567,8 @@ var ZoteroPane = new function()
 	
 	
 	this.emptyTrash = function () {
+		var libraryID = this.getSelectedLibraryID();
+		
 		var ps = Components.classes["@mozilla.org/embedcomp/prompt-service;1"]
 								.getService(Components.interfaces.nsIPromptService);
 		
@@ -1580,7 +1579,7 @@ var ZoteroPane = new function()
 				+ Zotero.getString('general.actionCannotBeUndone')
 		);
 		if (result) {
-			Zotero.Items.emptyTrash();
+			Zotero.Items.emptyTrash(libraryID);
 			Zotero.purgeDataObjects(true);
 		}
 	}
@@ -1909,15 +1908,17 @@ var ZoteroPane = new function()
 	
 	
 	this.getSelectedLibraryID = function () {
-		var group = this.getSelectedGroup();
-		if (group) {
-			return group.libraryID;
+		var itemGroup = this.getItemGroup();
+		var groupID = this.getSelectedGroup(true);
+		if (groupID) {
+			return groupID;
 		}
-		var collection = this.getSelectedCollection();
-		if (collection) {
-			return collection.libraryID;
+		else if (itemGroup.isWithinGroup()) {
+			return itemGroup.ref.libraryID;
+		}
+		else {
+			return null;
 		}
-		return null;
 	}
 	
 	
@@ -1960,7 +1961,8 @@ var ZoteroPane = new function()
 		if (this.collectionsView.selection
 				&& this.collectionsView.selection.count > 0
 				&& this.collectionsView.selection.currentIndex != -1) {
-			var itemGroup = this.collectionsView._getItemAtRow(this.collectionsView.selection.currentIndex);
+		
+			var itemGroup = this.getItemGroup();
 			if (itemGroup && itemGroup.isGroup()) {
 				return asID ? itemGroup.ref.id : itemGroup.ref;
 			}